package com.colin.base.deadlock;

import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * Created by Colin on 2020/3/28 14:14
 * email: colinzhaodong@gmail.com
 * desc: //todo
 *
 * @author zhaod
 */
public class TryLockDeadLock implements Runnable{
	int flag = 1;
	static Lock lock1 = new ReentrantLock();
	static Lock lock2 = new ReentrantLock();

	public static void main(String[] args) {
		TryLockDeadLock r1 = new TryLockDeadLock();
		TryLockDeadLock r2 = new TryLockDeadLock();
		r1.flag = 1;
		r2.flag = 0;
		new Thread(r1).start();
		new Thread(r2).start();
	}

	@Override
	public void run() {
		for (int i = 0; i < 100; i++) {
			if (flag == 1) {
				try {
					if (lock1.tryLock(800, TimeUnit.MILLISECONDS)) {
						System.out.println("线程1获取到了锁1");
						Thread.sleep(new Random().nextInt(1000));
						if (lock2.tryLock(800, TimeUnit.MILLISECONDS)) {
							System.out.println("线程1获取到了锁2");
							System.out.println("线程1成功获取到了两把锁");
							lock2.unlock();
							lock1.unlock();
							break;
						} else {
							System.out.println("线程1尝试获取锁2失败，已重试");
							lock1.unlock();
							Thread.sleep(new Random().nextInt(1000));
						}
					} else {
						System.out.println("线程1获取锁1失败，已重试");
					}
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
			if (flag == 0) {
				try {
					if (lock2.tryLock(3000, TimeUnit.MILLISECONDS)) {
						System.out.println("线程2获取到了锁2");

						Thread.sleep(new Random().nextInt(1000));
						if (lock1.tryLock(3000, TimeUnit.MILLISECONDS)) {
							System.out.println("线程2获取到了锁1");
							System.out.println("线程2成功获取到了两把锁");
							lock1.unlock();
							lock2.unlock();
							break;
						} else {
							System.out.println("线程2尝试获取锁1失败，已重试");
							lock2.unlock();
							Thread.sleep(new Random().nextInt(1000));
						}
					} else {
						System.out.println("线程2获取锁2失败，已重试");
					}
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}
	}
}
